The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 04, 2004
Filed:
Jan. 18, 2002
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
In an electric discharge machining apparatus using linear motor drive in which a machining power supply unit supplies an inter-electrode space between an electrode ( ) and a workpiece ( ) with a machining power and the workpiece ( ) is machined while the electrode ( ) and the workpiece ( ) are moved in relation to each other by means of a driving device ( ) implemented by a linear motor, a magnet supporting plate ( ) for supporting a magnet ( ) which is on the secondary side of the linear motor; a base plate ( ) formed with at least one hole portion ( ); a spacer ( ) for holding the magnet supporting plate ( ) and the base plate ( ) while leaving a predetermined space therebetween; and a compressor, ( ), a dryer ( ), a lubricator ( ) and a regulator ( ) for injecting compressed gas ( ) from the hole portion ( ) toward the magnet supporting plate ( ) are provided. By making the compressed gas ( ) into collision with the magnet supporting plate ( ) as a collision jet, the heat conductivity increases, so that it is possible to cool the magnet ( ) and the magnet supporting plate ( ) efficiently with a simple configuration.